Power was out for varying lengths in about a half-mile radius, including businesses on Galbraith and Montgomery roads.

Such tree-related power outages typically occur during storms or high winds, but Sunday was picture-perfect, with only a mild breeze.

Traffic signals were knocked out from Hosbrook to Stewart Road, but Hamilton County Sheriff's Cpl. William Rarrick, whose patrol vehicle blocked off Hosbrook near the scene, said there were no reports of accidents.

Power was out for nearly an hour at most of the Towne Center businesses, with many customers quickly getting to the food court area, where lighting was restored.

2 injured in separate canoeing accidents

BROOKVILLE, Ind. -- A 6-year-old Cincinnati boy and a 16-year-old Richwood, Ky., boy -- were injured in separate incidents Sunday when their canoes overturned on the Whitewater River.

The 6-year-old was canoeing with his father on the Whitewater River at the southern edge of Brookville about 2 p.m. when the boat overturned, Indiana Conservation Officers said. The boy was pinned between his canoe and another canoe before he was pulled from the water.

About two hours later, near the same spot, the 16-year-old fell in the water when his canoe overturned. His foot became caught in debris in the river, and rescuers had to break his ankle to free him.

The derailment happened shortly after 10 a.m. on track that runs under several bridges.

About 30 cars went off the tracks in two places, Conrail spokesman Bob Sullivan said. The train, with three locomotives hauling 159 cars of mixed freight, was traveling from Pittsburgh to Columbus, Mr. Sullivan said.

It was uncertain Sunday what caused the train to derail, he said.

University celebrations lead to several arrests

Weekend celebrations at Ohio State University in Columbus and Ohio University in Athens led to arrests late Saturday and early Sunday, police said.

Police in Columbus used Mace and fired "knee-knocker" projectiles to help break up crowds after bottles and rocks were thrown at officers. At least one officer was slightly injured.

About a dozen people were arrested, most for disorderly conduct. The arrests near Ohio State came on the weekend of the university's annual African-American Heritage and Arts Festival. In Athens, nine arrests were made at Palmer Fest, the annual street party named for the street where it takes place near OU.